Gaya APA

Foster, N, H., Beaumont, E, A. (1992). Stratigraphic traps III. (1992). : Tulsa : ASPG,.

Gaya MLA

Foster, Norman, H.., Beaumont, Edward, A.. "Stratigraphic traps III.". 1992 : Tulsa : ASPG,, 1992. Text.